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Strategies for regeneration of components of nervous system: scaffolds, cells and biomolecules

机译:神经系统成分的再生策略:支架,细胞和生物分子

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Nerve diseases including acute injury such as peripheral nerve injury (PNI), spinal cord injury (SCI) and traumatic brain injury (TBI), and chronic disease like neurodegeneration disease can cause various function disorders of nervous system, such as those relating to memory and voluntary movement. These nerve diseases produce great burden for individual families and the society, for which a lot of efforts have been made. Axonal pathways represent a unidirectional and aligned architecture allowing systematic axonal development within the tissue. Following a traumatic injury, the intricate architecture suffers disruption leading to inhibition of growth and loss of guidance. Due to limited capacity of the body to regenerate axonal pathways, it is desirable to have biomimetic approach that has the capacity to graft a bridge across the lesion while providing optimal mechanical and biochemical cues for tissue regeneration. And for central nervous system injury, one more extra precondition is compulsory: creating a less inhibitory surrounding for axonal growth. Electrospinning is a cost-effective and straightforward technique to fabricate extracellular matrix (ECM)-like nanofibrous structures, with various fibrous forms such as random fibers, aligned fibers, 3D fibrous scaffold and core-shell fibers from a variety of polymers. The diversity and versatility of electrospinning technique, together with functionalizing cues such as neurotrophins, ECM-based proteins and conductive polymers, have gained considerable success for the nerve tissue applications. We are convinced that in the future the stem cell therapy with the support of functionalized electrospun nerve scaffolds could be a promising therapy to cure nerve diseases.
机译:神经疾病包括急性损伤,例如周围神经损伤(PNI),脊髓损伤(SCI)和脑外伤(TBI),以及慢性疾病,例如神经退行性疾病,可引起神经系统的各种功能障碍,例如与记忆力和自愿运动。这些神经疾病给个人家庭和社会带来了沉重的负担,为此做出了很多努力。轴突途径代表单向且对齐的结构,允许组织内系统性轴突发育。遭受外伤后,复杂的架构会遭受破坏,从而导致生长受到抑制并失去指导。由于身体再生轴突途径的能力有限,因此希望具有仿生方法,该方法具有在病灶上嫁接桥的能力,同时为组织再生提供最佳的机械和生化线索。对于中枢神经系统损伤,还必须有一个额外的先决条件:为轴突生长创造更少的抑制环境。电纺丝是一种经济高效且直接的技术,可用于制造细胞外基质(ECM)状的纳米纤维结构,具有多种纤维形式,例如无规纤维,排列的纤维,3D纤维支架和由各种聚合物制成的核壳纤维。电纺技术的多样性和多功能性,以及诸如神经营养蛋白,基于ECM的蛋白质和导电聚合物等功能化提示,已在神经组织应用中获得了相当大的成功。我们坚信,在功能性电纺神经支架的支持下,干细胞疗法将来可能成为治疗神经疾病的有前途的疗法。

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